The picture below courtesy of the epa indoor airplus program which we provide builder verification services for helps show how the system works.
Air baffle attic insulation.
Without a wind wash barrier air enters the attic freely and flows above the insulation in the ceiling greatly reducing its r value.
This can cause moisture buildup.
An attic baffle is simply an item to regulate the flow of air aka required roof venting and impede it the insulation from interfering with each other.
Accuvent acts as an all in one wind wash barrier and vent.
They are known are also known as wind baffle insulation baffles rafter vents or venting chutes.
The ventilation system features polystyrene construction which is lightweight and moisture resistant and the integrated baffle means that you need no blocking material between the vent and the top plate.
From left to right air flows through the soffit vents up over the baffles allowing for the required roof venting.
They are usually made from cardboard or rigid foam board or polyvinyl chloride.
The beauty of attic baffles is that they are available from most home improvement stores and can be installed simply with a few staples if you want the diy approach.
It is a fairly easy process that will make a world of difference in assisting your insulation and keeping your home protected from rot which can save you a substantial amount of money down the road.
Rafter vent with built in baffle helps keep air moving in your attic.
Sometimes called rafter vents baffles provide ventilation and keep the insulation from blocking airflow through your attic.
The ado products durovent 23 1 2 in.
In brief baffles are designed to provide a channel of air to flow through specific parts of your attic.